#define _CRT_SECURE_NO_WARNINGS
#include<stdio.h>
int main()
{
	int year = 1000;
	while (year <= 2000)
		{
			if ((year%4==0&&year%100!=0)||(year % 100 == 0 && year % 400 == 0))
				{
					printf(" %d ", year);
				}
			year++;
		}
	return 0;
}